Home / 11,531.20-15,917.28-7,703.68

Finding the Fourth Proportional to 11,531.20, 15,917.28 and 7,703.68

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Solution

The fourth proportional to 11,531.20, 15,917.28 and 7,703.68 is: 10,633.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,531.20 : 15,917.28 = 7,703.68 : x
  2. Step 2: Convert to fraction form
    11,531.20/15,917.28 = 7,703.68/x
  3. Step 3: Cross multiply
    11,531.20x = 15,917.28 × 7,703.68
  4. Step 4: Simplify right side
    11,531.20x = 122,621,631.59
  5. Step 5: Solve for x
    x = 122,621,631.59/11,531.20
  6. Step 6: Final answer
    x = 10,633.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.